Double-tube injector.



no. 649,265. Patented mayl a, |900. e. J. vouna.

DOUBLE TUBE INJECTUB.

Application mea oez. 25, 1899.) (Model.)

STATES PATENT Frio.

EDWIN J. YOUNG, OF VADSWORTII, OHIO, ASSIGNOR TO TIIE OHIO 'i p INJEOTOR COMPANY, OF SAME PLACE.

DOUBLE-TUBE INJECTOR.

SPECIFICATION forming part of Letters Patent No. 649,265, dated May 8, 1900.

Application filed October 25, 1899. Serial No. 734,736. (Model.)

T0 aZZ whom it may concern,.-

Beit known that I, EDWIN J. YOUNG., a citizen of the United States, residing at Wadsworth, in the county of Medina and State of Ohio, have invented a certain new and useful Improvement in Double-Tube Injectors, of which the following is a full, clear, and exactdescription.

This invention relates to that class of injectors in which a double tube is employed and which are especially designed for use on locomotives.

The invention consists of a double-tube injector in which there is no communication between the water-chamber and thev deliverychamber excepting through an interposed forcing-tube, as I will proceed now inore particularly to set forth and finally claim.

In the accompanying drawing I have shown a longitudinal vertical section of my improved injector.

The steam-inlet is represented at a, the water-inlet at b, the overflow at c, and the boiler connection at CZ. The steam-inlet opens into the upper tube e, and the said upper tube is provided with the overiiow and the boiler connection. The water-inlet opens into the lower tubef. The steam-chamber g of the upper tube has avalve-seat h, beyond which is a passage t', which affords communication between the steam-chamber g of the upper tube and the steam-chambery' of the lower tube. The valve-seat h has the seat h' for the valve 7c and the seat h2 for the teaser Z, which is arranged within the valve 7c and has a certain amount of loose play therein, as in my Patent No. 495,286, dated April 1l, 1893.

m is the steam-jet, and n the forcing-tube.

o is a steam-jet which is interposed between the chamber j and the water-inlet and controlled by a valve p.

q is the lifting-tube, which is arranged in a wall q in the tubef and affords communication between the water-inlet and the waterchamber, part of which, r, is in the tu be fand the other part, o", in the tube e.

The overflow is provided with a diaphragm s, in which is a valve-seat to receive a valve s, and an opening is made above the diaphragm into the delivery-chamber t of the tube c. A guido-piece S2, arranged in a suitvalve is opened for the exhaust or escape of steam while the injector is lifting the water, because the forcing-tube is not large enough chamber or lifting-chamber to the deliverychamber and thence out at the overflow. When the water is lifted in these injectors, the. steam from the lifting steam-jet o is condensed, and then the valve between the chambers r and t is closed and the forcing steamjet m is put on and the water is forced to the boiler. When my injector is Working, the lifting-jet delivers the water to the forcingjet or to the chamber r r', where the forcingjet receives it the same asin other double-jet injectors; but, and herein my invention differs from others, I avoid the use of the reliefvalve which is usually placed between the chambers r r and t and in some cases works automatically and in others is worked by hand. The objection to this relief-valve is that it is impossible to keep it from leaking hot water back from the delivery-chamber to the water-chamber to be worked over againan operation which interferes with the injector working hot water. In my injector the water is lifted in starting the injector by means 'of the teaser Z. It will be observed that in the operation of my injector the valve 7o uncovers its port h before the teaser uncovers its port and that the steam which passes the valve 7c cannot pass outside of the teaser Z and so linto the passage i, but passes inside of the teaser Z, through the holes therein, and thence escapes through the nozzle of the teaser and into the forcing-tuberi.. The steam thus admitted exhausts through the said forcing-tube and out at the overliow until the water is raised, and this water so raised is drawn through the lifting-tube q to let all the steam escape from the water- IOO into the chamberr r and then forced through the forcing-tube n solely by the steam of the teaser until water appears at the overiow, and when the water appears at the overflow the valve 7s is drawn back until the teaser is unseated, and then steam escapes through the passage rto the chamber j and operates at both the lifting-jet o and the forcing-jet fm, it being assumed that the valvep has been unseated or opened. Now the lifting-jet o begins to lift the Water and deliver it to the chamber r r', Where the forcing-'jet receives it and forces it through the forcing-tube into the boiler.

The valve s', as already noted, is connected and moves with the main steam-valve and is closed by the same movement that opens said main steam-valve and puts on the forcer. The valve 19 is used to throttle the steam to the lifting-jet and serves thereby to grade or reduce the quantity of water delivered.

In prior constructions of double-tube injectors the injector is started by first admitting steam to the lifting-jet 0, which lifts through the lifting tube q and exhausts through the valve between the water-chami ber and delivery chamber until water is raised, at which time this steam is condensed and said valve closed, because the water and condensed steam can be put through the forcing-tube n, but the live steam from the lifting-jet cannot be put through the forcingtube. In my machine I do away with this large volume of live steam by using the teaser lto raise the water, which eondenses the steam from the lifting-jet when said jetis put on.

iVhat I claim is- 1. A double-tube injector, having aliftingjet, a forcing-jot, a stoamvalve, and a teaser which lifts through the forcing-tube before steam is admitted to the lifting-jet, substantially as described.

2. An injector, having a forcing-jet, a liftin g-j et, a water or lifting chamber, a deliverychamber, a forcing-tube forming the sole means of communication between the Said chambers, a steam-inlet and a doublesteamvalve, one member of which admits steam solely to the forcingetube and the other by a further movement thereof admits steam to the forcing -jet and the lifting-jet, substantially as described.

3. In a double-tube injector, a steam-chamber, a valve therein composed of a main valve and a teaser, the main valve having a movement independent of the teaser and a further movement eonjointly with the teaser, a lifting-chamber, a deliverybhamber, a forcing-tube forming the sole means of communication between said 1ifting-chamber and delivery chamber, an independent steamchamber adjacent to the lifting-chamber, a lifting-jet opening out from said steam-chamA ber, a throttle-valve for said lifting-jet, and a steampassage between the steam-chambers of the two tubes, which passage is closed during the initial movement of the main steam-Valve and until the water is raised and is opened upon the further movement of the main steam-valve for lifting the water, substantially as described.

In testimony whereof I have hereunto set my hand this 23d day of October, A.. D. 1899.

ED VIN J. YOUNG.

Witnesses: j

JOHN 1I. DURLiNo, E. S. PURDEE. 

